Line of Business Information

9 Months Ended

Sep. 30, 2012

Segment Reporting [Abstract]

Line Of Business Information

Line of Business Information

We have two lines of business: Investment Servicing and Investment Management. Given our services and management organization, the results of operations for these lines of business are not necessarily comparable with those of other companies, including companies in the financial services industry. Information about our two lines of business, as well as revenues, expenses and capital allocation methodologies with respect to these lines of business, is provided in note 24 to the consolidated financial statements included in our 2011 Form 10-K.

The following is a summary of our line of business results for the periods indicated. The “Other” columns for 2012 in the quarterly and nine-month tables included the net realized loss from the sale in the three months ended June 30, 2012 of all of our Greek investment securities previously classified as held to maturity (presented only in the nine-month table); a benefit related to claims associated with the 2008 Lehman Brothers bankruptcy; provisions for litigation exposure and other costs; acquisition-related integration costs; and restructuring charges associated with both our Business Operations and Information Technology Transformation program and expense control measures. The "Other" columns for 2011 included acquisition-related integration costs and restructuring charges associated with our Business Operations and Information Technology Transformation program. The amounts in the “Other” columns were not allocated to State Street's business lines. Results for the 2011 periods reflect the retroactive effect of management changes in methodology related to funds transfer pricing and expense allocation in 2012.

	Three Months Ended September 30,
(Dollars in millions, except where otherwise noted)	Investment Servicing						Investment Management						Other						Total
	2012			2011			2012			2011			2012			2011			2012			2011
Fee revenue:
Servicing fees	$	1,100		$	1,106														$	1,100		$	1,106
Management fees	—			—			$	251		$	229								251			229
Trading services	232			334			—			—									232			334
Securities finance	81			77			10			8									91			85
Processing fees and other	15			57			30			33									45			90
Total fee revenue	1,428			1,574			291			270									1,719			1,844
Net interest revenue	600			553			19			25									619			578
Gains related to investment securities, net	18			5			—			—									18			5
Total revenue	2,046			2,132			310			295									2,356			2,427
Expenses from operations	1,456			1,475			208			238									1,664			1,713
Claims resolution	—			—			—			—			$	(362	)				(362		)	—
Provisions for litigation exposure and other costs	—			—			—			—			85						85			—
Acquisition and restructuring costs	—			—			—			—			28			$	85		28			85
Total expenses	1,456			1,475			208			238			(249		)	85			1,415			1,798
Income (loss) before income tax expense	$	590		$	657		$	102		$	57		$	249		$	(85	)	$	941		$	629
Pre-tax margin	29		%	31		%	33		%	19		%
Average assets (in billions)	$	191.6		$	177.0		$	4.2		$	4.0								$	195.8		$	181.0

	Nine Months Ended September 30,
(Dollars in millions, except where otherwise noted)	Investment Servicing						Investment Management						Other						Total
	2012			2011			2012			2011			2012			2011			2012			2011
Fee revenue:
Servicing fees	$	3,264		$	3,325														$	3,264		$	3,325
Management fees	—			—			$	733		$	715								733			715
Trading services	767			947			—			—									767			947
Securities finance	296			252			35			36									331			288
Processing fees and other	112			179			75			73									187			252
Total fee revenue	4,439			4,703			843			824									5,282			5,527
Net interest revenue	1,854			1,647			62			80									1,916			1,727
Gains (losses) related to investment securities, net	48			25			—			—			$	(46	)				2			25
Total revenue	6,341			6,375			905			904			(46		)				7,200			7,279
Provision for loan losses	(1		)	1			—			—			—						(1		)	1
Expenses from operations	4,530			4,452			661			701			—						5,191			5,153
Claims resolution	—			—			—			—			(362		)				(362		)	—
Provisions for litigation exposure and other costs	—			—			—			—			107						107			—
Acquisition and restructuring costs, net	—			—			—			—			86			$	121		86			121
Total expenses	4,530			4,452			661			701			(169		)	121			5,022			5,274
Income (loss) before income tax expense	$	1,812		$	1,922		$	244		$	203		$	123		$	(121	)	$	2,179		$	2,004
Pre-tax margin	29		%	30		%	27		%	22		%
Average assets (in billions)	$	187.0		$	163.4		$	4.0		$	4.6								$	191.0		$	168.0